27.—(1) Any notification to be given under these Regulations shall—
(a)unless otherwise specified in these Regulations or determined in guidance issued by the Commission, be given in writing;
(b)unless otherwise specified in these Regulations, be made within such period as the Commission may determine in guidance.
(2) No time limit mentioned in these Regulations or determined by the Commission shall apply in any case where exceptional circumstances prevent that time limit being complied with.